package com.example.mybatisplus.service;

import com.example.mybatisplus.mapper.GradeMapper;
import com.example.mybatisplus.model.Grade;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class GradeService {
    @Autowired
    private GradeMapper mapper;
    public Grade selectById(Integer id){
        return mapper.selectById(id);
    }
}
